The ion chromatography is an analytical chemical method used to separate and quantify the ion in the solution. However, some of the ions in the samples sometimes interfere with the analysis, resulting in errors or inaccuracies. In order to address this problem, the ion chromatography inhibitor should emerge。
It is a chemical reagent that can inhibit the interference of some of the ions in the sample with the analysis. Typically, it is used to treat samples with high salt concentrations, since in this case the charge-exclusion effect between ions may prevent the accurate separation and detection of certain ions in the samples。
The function of the ion chromatography inhibitor is based on two mechanisms: a surfactant as an inhibitor (known as an anion surfactant) and a polymer as an ion exchange. Among them, surfactant inhibitors are commonly used。
Surfactant inhibitors are mainly a number of anion surfactants that can alter their charge status and polarity by forming compounds with ion to be measured. The compound is highly selective in ion exchange on the ion chromatography column and can separate the ion from other interference factors. The polymer inhibitors are larger polymer particles formed through the ion to be measured, making it difficult for them to cross the small hole in the column and achieve the same effect。
It should be noted that different ions can respond differently to different types of inhibitors. Therefore, the most appropriate inhibitor needs to be selected prior to use, depending on the properties of the ion to be measured and the sample。
In addition, usage needs to be mastered. The use of excessive inhibitors may have a negative impact on the results of the analysis. Conversely, if too few inhibitors are used, it may not be possible to inhibit interference with the ion. Therefore, there is a need for tests to determine the best use。
In conclusion, an ion chromatography inhibitor is a very effective chemical reagent that can help to address ion interference in high salt samples. At the time of use, the most appropriate inhibitor needs to be selected, based on the characteristics of the ion to be measured and the sample taken, and the amount of use is available. By using it correctly, the accuracy and reliability of the analysis results can be improved。
